ASNR considers that the organisation of environmental protection at Gravelines NPP and its performance remain satisfactory. However, discrepancies concerning the condition of certain installations collecting or transporting liquid effluent, as well as the management of liquid and gaseous effluent discharges, need to be corrected. Efforts in recent years have improved the management of equipment using SF6 (a powerful greenhouse gas), but there are still deviations when it comes to emissions of other greenhouse refrigerants. In 2025, ASNR noted a slight deterioration in worker radiation protection and a return to the difficulties encountered in previous years. The site reported an event classified at level 2 on the INES scale relating to external contamination of a worker resulting in a skin dose in excess of the annual statutory dose limit (see highlight 10 in chapter 8 of the full ASNR Report). This event contributes to a mixed picture, with persistent shortcomings in worksite preparation and management. ASNR is calling for greater vigilance in applying the optimisation approach and coordinating radiation protection measures with outside contractors, in order to anticipate risks and reduce exposure. ASNR also observes an increase in deviations linked to deficiencies in the radiation protection culture or rigour of the workers, particularly regarding the conditions of access to regulated work areas and taking changes in regulatory zoning into account. Accidents at work on the site remained at high numbers but stable compared with the previous year against a backdrop of rising national figures. The occurrence of severe accidents in 2025 led to a formal notice from the Labour Inspectorate concerning the lack of collective protection in certain work areas against the risk of falling from a height. Improvements are expected in terms of compliance with the provisions of the Labour Code relating to traffic on the site regarding the risk of collision between machinery and pedestrians, ventilation of premises with specific pollution and the lifting of loads, for which deviations have been noted from time to time. Hauts‑de‑France ABSTRACTS – ASNR Report on the state of nuclear safety and radiation protection in France in 2025 63
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